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Hybrid Vehicle (HV) Battery Pack and Auxiliary Battery
The RX 400h contains a next generation high voltage, Hybrid Vehicle
(HV) battery pack and a low voltage auxiliary battery. The HV battery
pack contains non-spillable, sealed Nickel Metal Hydride (NiMH)
battery modules and the auxiliary battery is a typical automotive lead-
acid type.
HV Battery Pack
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The HV battery pack is enclosed in a metal case and is rigidly mounted to
the cabin area floor pan cross member under the rear seat. The metal case
is isolated from high voltage and concealed by a cover in the cabin area.
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The HV battery pack consists of 30 low voltage (9.6-Volt) NiMH battery
modules connected in series to produce approximately 288-Volts. Each
NiMH battery module is non-spillable and sealed in a metal case.
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The electrolyte used in the NiMH battery module is an alkaline of
potassium and sodium hydroxide. The electrolyte is absorbed into the
battery cell plates and will form a gel that will not normally leak, even in
a collision.
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In the unlikely event the battery pack is overcharged, the modules vent
gases directly outside the vehicle through a vent hose.
HV Battery Pack
Battery pack voltage
288-Volts
Number of NiMH battery modules in the pack
30
NiMH battery module voltage
9.6-Volts
NiMH battery pack dimensions
25 x 43 x 7 in
(63 x 108 x 18 cm)
NiMH battery Pack weight
152.1 lbs
(69 kg)
Components Powered by the HV Battery Pack
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Front Electric Motor
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Rear Electric Motor (with 4WD)
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Inverter/Converter
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A/C
Compressor
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Electric Generator
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Power
Cables
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Electric Power Steering
HV Battery Pack Recycling
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The HV battery pack is recyclable. Contact the nearest Lexus dealer or
Lexus Roadside Assistance at:
United States: (800) 255-3987, Canada: (800) 265-3987
Auxiliary Battery
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The RX 400h also contains a lead-acid 12-Volt battery. The 12-Volt
auxiliary battery powers the vehicle electrical system similar to a
conventional vehicle. As with conventional vehicles, the auxiliary battery
is grounded (negative pole) to the metal chassis of the vehicle.
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The auxiliary battery is located in engine compartment area.
288-Volt HV Battery Pack
12-Volt Auxiliary Battery in Engine
Compartment.
HV Battery Pack Mounted in Cabin Area
